You can purchase the RTAS version for $150 from Waves IF you are a current, registered owner of the package you want to use. You will also have to purchase the Griffin Technologies (griffintechnologies.com) iMate USB-to-ADB adapter. I think it's about $40. The best place to run it is directly into the Mac's USB port, although some people have been successful in running it right off the extra USB port on the keyboard. Then you must download the 2.8.1 TDM version of the package. You use that with the new RTAS Waveshell. There are more complete instructions on the waves site. I'm sure that eventually they'll have CDs with everything you need on them, but because this is so new (RTAS), this is the way it's done at the moment.